參數(shù)資料
型號: AD8628AUJ-REEL7
廠商: Analog Devices Inc
文件頁數(shù): 7/24頁
文件大?。?/td> 0K
描述: IC OPAMP CHOPPER R-R TSOT23-5
設(shè)計資源: Precision, Unipolar, Inverting Conversion Using AD5546/56 DAC (CN0022)
Precision, Unipolar, Inverting Conversion Using AD5547/57 DAC (CN0026)
Precision, Unipolar, Noninverting Configuration for the AD5547/57 DAC (CN0027)
Precision, Unipolar, Noninverting Configuration for the AD5546/56 DAC (CN0023)
High Precision Digital-to-Analog Conversion Using the 16-Bit AD5542/1, ADR421, and AD8628 (CN0079)
標準包裝: 3,000
放大器類型: 零漂移
電路數(shù): 1
輸出類型: 滿擺幅
轉(zhuǎn)換速率: 1 V/µs
增益帶寬積: 2.5MHz
-3db帶寬: 2.5MHz
電流 - 輸入偏壓: 30pA
電壓 - 輸入偏移: 1µV
電流 - 電源: 850µA
電流 - 輸出 / 通道: 30mA
電壓 - 電源,單路/雙路(±): 2.7 V ~ 5 V,±1.35 V ~ 2.5 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: SOT-23-5 細型,TSOT-23-5
供應(yīng)商設(shè)備封裝: TSOT-23-5
包裝: 帶卷 (TR)
Data Sheet
AD8628/AD8629/AD8630
Rev. J | Page 15 of 24
FUNCTIONAL DESCRIPTION
The AD8628/AD8629/AD8630 are single-supply, ultrahigh
precision rail-to-rail input and output operational amplifiers.
The typical offset voltage of less than 1 V allows these amplifiers
to be easily configured for high gains without risk of excessive
output voltage errors. The extremely small temperature drift
of 2 nV/°C ensures a minimum offset voltage error over their
entire temperature range of 40°C to +125°C, making these
amplifiers ideal for a variety of sensitive measurement applica-
tions in harsh operating environments.
The AD8628/AD8629/AD8630 achieve a high degree of precision
through a patented combination of auto-zeroing and chopping.
This unique topology allows the AD8628/AD8629/AD8630 to
maintain their low offset voltage over a wide temperature range
and over their operating lifetime. The AD8628/AD8629/AD8630
also optimize the noise and bandwidth over previous generations
of auto-zero amplifiers, offering the lowest voltage noise of any
auto-zero amplifier by more than 50%.
Previous designs used either auto-zeroing or chopping to add
precision to the specifications of an amplifier. Auto-zeroing
results in low noise energy at the auto-zeroing frequency, at the
expense of higher low frequency noise due to aliasing of wideband
noise into the auto-zeroed frequency band. Chopping results in
lower low frequency noise at the expense of larger noise energy
at the chopping frequency. The AD8628/AD8629/AD8630
family uses both auto-zeroing and chopping in a patented ping-
pong arrangement to obtain lower low frequency noise together
with lower energy at the chopping and auto-zeroing frequencies,
maximizing the signal-to-noise ratio for the majority of
applications without the need for additional filtering. The
relatively high clock frequency of 15 kHz simplifies filter
requirements for a wide, useful noise-free bandwidth.
The AD8628 is among the few auto-zero amplifiers offered in
the 5-lead TSOT package. This provides a significant improvement
over the ac parameters of the previous auto-zero amplifiers. The
AD8628/AD8629/AD8630 have low noise over a relatively wide
bandwidth (0 Hz to 10 kHz) and can be used where the highest
dc precision is required. In systems with signal bandwidths of
from 5 kHz to 10 kHz, the AD8628/AD8629/AD8630 provide
true 16-bit accuracy, making them the best choice for very high
resolution systems.
1/f NOISE
1/f noise, also known as pink noise, is a major contributor to
errors in dc-coupled measurements. This 1/f noise error term
can be in the range of several V or more, and, when amplified
with the closed-loop gain of the circuit, can show up as a large
output offset. For example, when an amplifier with a 5 V p-p
1/f noise is configured for a gain of 1000, its output has 5 mV of
error due to the 1/f noise. However, the AD8628/AD8629/AD8630
eliminate 1/f noise internally, thereby greatly reducing output errors.
The internal elimination of 1/f noise is accomplished as follows.
1/f noise appears as a slowly varying offset to the AD8628/AD8629/
AD8630 inputs. Auto-zeroing corrects any dc or low frequency
offset. Therefore, the 1/f noise component is essentially removed,
leaving the AD8628/AD8629/AD8630 free of 1/f noise.
One advantage that the AD8628/AD8629/AD8630 bring to
system applications over competitive auto-zero amplifiers is their
very low noise. The comparison shown in Figure 49 indicates
an input-referred noise density of 19.4 nV/√Hz at 1 kHz for
the AD8628, which is much better than the Competitor A
and Competitor B. The noise is flat from dc to 1.5 kHz, slowly
increasing up to 20 kHz. The lower noise at low frequency is
desirable where auto-zero amplifiers are widely used.
02735-
046
MK AT 1kHz FOR ALL 3 GRAPHS
FREQUENCY (kHz)
VOLTA
GE
N
OIS
ED
EN
SITY
(nV
/√
H
z)
120
105
90
75
60
45
30
15
0
4
2
8
6
10
12
COMPETITOR A
(89.7nV/√Hz)
COMPETITOR B
(31.1nV/√Hz)
AD8628
(19.4nV/√Hz)
Figure 49. Noise Spectral Density of AD8628 vs. Competition
相關(guān)PDF資料
PDF描述
1SMB170AT3 TVS ZENER UNIDIR 600W 170V SMB
TSW-128-08-L-S CONN HEADER 28POS .100" SGL GOLD
FWH-007A6F FUSE 7A 500V 6X32MM UL CSA
1SMB16CAT3 TVS ZENER BIDIRECT 600W 16V SMB
TSW-129-08-L-S CONN HEADER 29POS .100" SGL GOLD
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD8628AUJZ 制造商:Analog Devices 功能描述:OP AMP CHOPPER R-R TSOT23-5 制造商:Analog Devices 功能描述:OP AMP, CHOPPER, R-R, TSOT23-5 制造商:Analog Devices 功能描述:OP AMP, CHOPPER, R-R, TSOT23-5, Op Amp Type:Rail to Rail, No. of Amplifiers:1, Slew Rate:1V/s, Supply Voltage Range:2.7V to 5V, Amplifier Case Style:TSOT, No. of Pins:5, Bandwidth:2.5MHz, Operating Temperature Min:-40C, Operating , RoHS Compliant: Yes
AD8628AUJZ-R2 功能描述:IC OPAMP CHOPPER R-R TSOT23-5 RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:50 系列:- 放大器類型:通用 電路數(shù):2 輸出類型:滿擺幅 轉(zhuǎn)換速率:1.8 V/µs 增益帶寬積:6.5MHz -3db帶寬:4.5MHz 電流 - 輸入偏壓:5nA 電壓 - 輸入偏移:100µV 電流 - 電源:65µA 電流 - 輸出 / 通道:35mA 電壓 - 電源,單路/雙路(±):1.8 V ~ 5.25 V,±0.9 V ~ 2.625 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP,10-MSOP(0.118",3.00mm 寬) 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件
AD8628AUJZ-REEL 功能描述:IC OPAMP CHOPPER R-R TSOT23-5 RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:160 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:10 V/µs 增益帶寬積:9MHz -3db帶寬:- 電流 - 輸入偏壓:1pA 電壓 - 輸入偏移:250µV 電流 - 電源:730µA 電流 - 輸出 / 通道:28mA 電壓 - 電源,單路/雙路(±):2.7 V ~ 5.5 V,±1.35 V ~ 2.75 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC(0.154",3.90mm 寬) 供應(yīng)商設(shè)備封裝:16-SOIC N 包裝:管件
AD8628AUJZ-REEL7 功能描述:IC OPAMP CHOPPER R-R TSOT23-5 RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 產(chǎn)品培訓(xùn)模塊:Differential Circuit Design Techniques for Communication Applications 標準包裝:1 系列:- 放大器類型:RF/IF 差分 電路數(shù):1 輸出類型:差分 轉(zhuǎn)換速率:9800 V/µs 增益帶寬積:- -3db帶寬:2.9GHz 電流 - 輸入偏壓:3µA 電壓 - 輸入偏移:- 電流 - 電源:40mA 電流 - 輸出 / 通道:- 電壓 - 電源,單路/雙路(±):3 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-VQFN 裸露焊盤,CSP 供應(yīng)商設(shè)備封裝:16-LFCSP-VQ 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:551 (CN2011-ZH PDF) 其它名稱:ADL5561ACPZ-R7CT
AD8628WARTZ-R7 功能描述:IC OPAMP CHOPPER R-R SOT23-5 RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:2,500 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源,單路/雙路(±):2.7 V ~ 36 V,±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC(0.154",3.90mm 寬) 供應(yīng)商設(shè)備封裝:8-SO 包裝:帶卷 (TR)